Comparison Study of MRR & TWR of Die Sinking EDM Machining using Copper and Brass Electrode for EN-9 (Low Alloy Steel) Material

EDM is an advanced machining process for machining, hard material parts which are difficult to machined by conventional machining process. There are various types of products which can be produced by using Die-sinking EDM, such as dies, moulds. Parts of aerospace, automobile industry and surgical components can be fin-ished machined by EDM. In present scenario numbers of researchers have explored a number of ways to improve EDM efficiency. The optimum selection of manufacturing condition is very important in manufacturing processes as they determine surface quality, dimensional accuracy of the obtained parts. This experimental investigation is mainly focused on comparison of MRR & TWR by using Copper and Brass electrode on different pulse-on time (ps), current and voltage, whose values are designed by Taguchi method. In this experiment, it is evaluated that copper has more MRR than brass and have less TWR comparatively.